vcs.maemo.org Git - wpasupplicant/blob - src/drivers/driver_roboswitch.c

   1 /*
   2  * WPA Supplicant - roboswitch driver interface
   3  * Copyright (c) 2008-2009 Jouke Witteveen
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16 #include <sys/ioctl.h>
  17 #include <linux/if.h>
  18 #include <linux/sockios.h>
  19 #include <linux/if_ether.h>
  20 #include <linux/mii.h>
  21
  22 #include "common.h"
  23 #include "driver.h"
  24 #include "l2_packet/l2_packet.h"
  25
  26 #ifndef ETH_P_EAPOL
  27 #define ETH_P_EAPOL             0x888e
  28 #endif
  29
  30 #define ROBO_PHY_ADDR           0x1e    /* RoboSwitch PHY address */
  31
  32 /* MII access registers */
  33 #define ROBO_MII_PAGE           0x10    /* MII page register */
  34 #define ROBO_MII_ADDR           0x11    /* MII address register */
  35 #define ROBO_MII_DATA_OFFSET    0x18    /* Start of MII data registers */
  36
  37 #define ROBO_MII_PAGE_ENABLE    0x01    /* MII page op code */
  38 #define ROBO_MII_ADDR_WRITE     0x01    /* MII address write op code */
  39 #define ROBO_MII_ADDR_READ      0x02    /* MII address read op code */
  40 #define ROBO_MII_DATA_MAX          4    /* Consecutive MII data registers */
  41 #define ROBO_MII_RETRY_MAX        10    /* Read attempts before giving up */
  42
  43 /* Page numbers */
  44 #define ROBO_ARLCTRL_PAGE       0x04    /* ARL control page */
  45 #define ROBO_VLAN_PAGE          0x34    /* VLAN page */
  46
  47 /* ARL control page registers */
  48 #define ROBO_ARLCTRL_CONF       0x00    /* ARL configuration register */
  49 #define ROBO_ARLCTRL_ADDR_1     0x10    /* Multiport address 1 */
  50 #define ROBO_ARLCTRL_VEC_1      0x16    /* Multiport vector 1 */
  51 #define ROBO_ARLCTRL_ADDR_2     0x20    /* Multiport address 2 */
  52 #define ROBO_ARLCTRL_VEC_2      0x26    /* Multiport vector 2 */
  53
  54 /* VLAN page registers */
  55 #define ROBO_VLAN_ACCESS        0x08    /* VLAN table access register */
  56 #define ROBO_VLAN_ACCESS_5350   0x06    /* VLAN table access register (5350) */
  57 #define ROBO_VLAN_READ          0x0c    /* VLAN read register */
  58 #define ROBO_VLAN_MAX           0xff    /* Maximum number of VLANs */
  59
  60
  61 static const u8 pae_group_addr[ETH_ALEN] =
  62 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 };
  63
  64
  65 struct wpa_driver_roboswitch_data {
  66         void *ctx;
  67         struct l2_packet_data *l2;
  68         char ifname[IFNAMSIZ + 1];
  69         u8 own_addr[ETH_ALEN];
  70         struct ifreq ifr;
  71         int fd, is_5350;
  72         u16 ports;
  73 };
  74
  75
  76 /* Copied from the kernel-only part of mii.h. */
  77 static inline struct mii_ioctl_data *if_mii(struct ifreq *rq)
  78 {
  79         return (struct mii_ioctl_data *) &rq->ifr_ifru;
  80 }
  81
  82
  83 /*
  84  * RoboSwitch uses 16-bit Big Endian addresses.
  85  * The ordering of the words is reversed in the MII registers.
  86  */
  87 static void wpa_driver_roboswitch_addr_be16(const u8 addr[ETH_ALEN], u16 *be)
  88 {
  89         int i;
  90         for (i = 0; i < ETH_ALEN; i += 2)
  91                 be[(ETH_ALEN - i) / 2 - 1] = WPA_GET_BE16(addr + i);
  92 }
  93
  94
  95 static u16 wpa_driver_roboswitch_mdio_read(
  96         struct wpa_driver_roboswitch_data *drv, u8 reg)
  97 {
  98         struct mii_ioctl_data *mii = if_mii(&drv->ifr);
  99
 100         mii->phy_id = ROBO_PHY_ADDR;
 101         mii->reg_num = reg;
 102
 103         if (ioctl(drv->fd, SIOCGMIIREG, &drv->ifr) < 0) {
 104                 perror("ioctl[SIOCGMIIREG]");
 105                 return 0x00;
 106         }
 107         return mii->val_out;
 108 }
 109
 110
 111 static void wpa_driver_roboswitch_mdio_write(
 112         struct wpa_driver_roboswitch_data *drv, u8 reg, u16 val)
 113 {
 114         struct mii_ioctl_data *mii = if_mii(&drv->ifr);
 115
 116         mii->phy_id = ROBO_PHY_ADDR;
 117         mii->reg_num = reg;
 118         mii->val_in = val;
 119
 120         if (ioctl(drv->fd, SIOCSMIIREG, &drv->ifr) < 0) {
 121                 perror("ioctl[SIOCSMIIREG");
 122         }
 123 }
 124
 125
 126 static int wpa_driver_roboswitch_reg(struct wpa_driver_roboswitch_data *drv,
 127                                      u8 page, u8 reg, u8 op)
 128 {
 129         int i;
 130
 131         /* set page number */
 132         wpa_driver_roboswitch_mdio_write(drv, ROBO_MII_PAGE,
 133                                          (page << 8) | ROBO_MII_PAGE_ENABLE);
 134         /* set register address */
 135         wpa_driver_roboswitch_mdio_write(drv, ROBO_MII_ADDR, (reg << 8) | op);
 136
 137         /* check if operation completed */
 138         for (i = 0; i < ROBO_MII_RETRY_MAX; ++i) {
 139                 if ((wpa_driver_roboswitch_mdio_read(drv, ROBO_MII_ADDR) & 3)
 140                     == 0)
 141                         return 0;
 142         }
 143         /* timeout */
 144         return -1;
 145 }
 146
 147
 148 static int wpa_driver_roboswitch_read(struct wpa_driver_roboswitch_data *drv,
 149                                       u8 page, u8 reg, u16 *val, int len)
 150 {
 151         int i;
 152
 153         if (len > ROBO_MII_DATA_MAX ||
 154             wpa_driver_roboswitch_reg(drv, page, reg, ROBO_MII_ADDR_READ) < 0)
 155                 return -1;
 156
 157         for (i = 0; i < len; ++i) {
 158                 val[i] = wpa_driver_roboswitch_mdio_read(
 159                         drv, ROBO_MII_DATA_OFFSET + i);
 160         }
 161
 162         return 0;
 163 }
 164
 165
 166 static int wpa_driver_roboswitch_write(struct wpa_driver_roboswitch_data *drv,
 167                                        u8 page, u8 reg, u16 *val, int len)
 168 {
 169         int i;
 170
 171         if (len > ROBO_MII_DATA_MAX) return -1;
 172         for (i = 0; i < len; ++i) {
 173                 wpa_driver_roboswitch_mdio_write(drv, ROBO_MII_DATA_OFFSET + i,
 174                                                  val[i]);
 175         }
 176         return wpa_driver_roboswitch_reg(drv, page, reg, ROBO_MII_ADDR_WRITE);
 177 }
 178
 179
 180 static void wpa_driver_roboswitch_receive(void *priv, const u8 *src_addr,
 181                                           const u8 *buf, size_t len)
 182 {
 183         struct wpa_driver_roboswitch_data *drv = priv;
 184
 185         if (len > 14 && WPA_GET_BE16(buf + 12) == ETH_P_EAPOL &&
 186             os_memcmp(buf, drv->own_addr, ETH_ALEN) == 0) {
 187                 wpa_supplicant_rx_eapol(drv->ctx, src_addr, buf + 14,
 188                                         len - 14);
 189         }
 190 }
 191
 192
 193 static int wpa_driver_roboswitch_get_ssid(void *priv, u8 *ssid)
 194 {
 195         ssid[0] = 0;
 196         return 0;
 197 }
 198
 199
 200 static int wpa_driver_roboswitch_get_bssid(void *priv, u8 *bssid)
 201 {
 202         /* Report PAE group address as the "BSSID" for wired connection. */
 203         os_memcpy(bssid, pae_group_addr, ETH_ALEN);
 204         return 0;
 205 }
 206
 207
 208 static int wpa_driver_roboswitch_get_capa(void *priv,
 209                                           struct wpa_driver_capa *capa)
 210 {
 211         os_memset(capa, 0, sizeof(*capa));
 212         capa->flags = WPA_DRIVER_FLAGS_WIRED;
 213         return 0;
 214 }
 215
 216
 217 static int wpa_driver_roboswitch_set_param(void *priv, const char *param)
 218 {
 219         struct wpa_driver_roboswitch_data *drv = priv;
 220         char *sep;
 221
 222         if (param == NULL || os_strstr(param, "multicast_only=1") == NULL) {
 223                 sep = drv->ifname + os_strlen(drv->ifname);
 224                 *sep = '.';
 225                 drv->l2 = l2_packet_init(drv->ifname, NULL, ETH_P_ALL,
 226                                          wpa_driver_roboswitch_receive, drv,
 227                                          1);
 228                 if (drv->l2 == NULL) {
 229                         wpa_printf(MSG_INFO, "%s: Unable to listen on %s",
 230                                    __func__, drv->ifname);
 231                         return -1;
 232                 }
 233                 *sep = '\0';
 234                 l2_packet_get_own_addr(drv->l2, drv->own_addr);
 235         } else {
 236                 wpa_printf(MSG_DEBUG, "%s: Ignoring unicast frames", __func__);
 237                 drv->l2 = NULL;
 238         }
 239         return 0;
 240 }
 241
 242
 243 static const char * wpa_driver_roboswitch_get_ifname(void *priv)
 244 {
 245         struct wpa_driver_roboswitch_data *drv = priv;
 246         return drv->ifname;
 247 }
 248
 249
 250 static int wpa_driver_roboswitch_join(struct wpa_driver_roboswitch_data *drv,
 251                                       u16 ports, const u8 *addr)
 252 {
 253         u16 read1[3], read2[3], addr_be16[3];
 254
 255         wpa_driver_roboswitch_addr_be16(addr, addr_be16);
 256
 257         if (wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
 258                                        ROBO_ARLCTRL_CONF, read1, 1) < 0)
 259                 return -1;
 260         if (!(read1[0] & (1 << 4))) {
 261                 /* multiport addresses are not yet enabled */
 262                 read1[0] |= 1 << 4;
 263                 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
 264                                             ROBO_ARLCTRL_ADDR_1, addr_be16, 3);
 265                 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
 266                                             ROBO_ARLCTRL_VEC_1, &ports, 1);
 267                 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
 268                                             ROBO_ARLCTRL_ADDR_2, addr_be16, 3);
 269                 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
 270                                             ROBO_ARLCTRL_VEC_2, &ports, 1);
 271                 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
 272                                             ROBO_ARLCTRL_CONF, read1, 1);
 273         } else {
 274                 /* if both multiport addresses are the same we can add */
 275                 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
 276                                            ROBO_ARLCTRL_ADDR_1, read1, 3);
 277                 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
 278                                            ROBO_ARLCTRL_ADDR_2, read2, 3);
 279                 if (os_memcmp(read1, read2, 6) != 0)
 280                         return -1;
 281                 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
 282                                            ROBO_ARLCTRL_VEC_1, read1, 1);
 283                 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
 284                                            ROBO_ARLCTRL_VEC_2, read2, 1);
 285                 if (read1[0] != read2[0])
 286                         return -1;
 287                 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
 288                                             ROBO_ARLCTRL_ADDR_1, addr_be16, 3);
 289                 wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
 290                                             ROBO_ARLCTRL_VEC_1, &ports, 1);
 291         }
 292         return 0;
 293 }
 294
 295
 296 static int wpa_driver_roboswitch_leave(struct wpa_driver_roboswitch_data *drv,
 297                                        u16 ports, const u8 *addr)
 298 {
 299         u16 _read, addr_be16[3], addr_read[3], ports_read;
 300
 301         wpa_driver_roboswitch_addr_be16(addr, addr_be16);
 302
 303         wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, ROBO_ARLCTRL_CONF,
 304                                    &_read, 1);
 305         /* If ARL control is disabled, there is nothing to leave. */
 306         if (!(_read & (1 << 4))) return -1;
 307
 308         wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
 309                                    ROBO_ARLCTRL_ADDR_1, addr_read, 3);
 310         wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE, ROBO_ARLCTRL_VEC_1,
 311                                    &ports_read, 1);
 312         /* check if we occupy multiport address 1 */
 313         if (os_memcmp(addr_read, addr_be16, 6) == 0 && ports_read == ports) {
 314                 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
 315                                            ROBO_ARLCTRL_ADDR_2, addr_read, 3);
 316                 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
 317                                            ROBO_ARLCTRL_VEC_2, &ports_read, 1);
 318                 /* and multiport address 2 */
 319                 if (os_memcmp(addr_read, addr_be16, 6) == 0 &&
 320                     ports_read == ports) {
 321                         _read &= ~(1 << 4);
 322                         wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
 323                                                     ROBO_ARLCTRL_CONF, &_read,
 324                                                     1);
 325                 } else {
 326                         wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
 327                                                    ROBO_ARLCTRL_ADDR_1,
 328                                                    addr_read, 3);
 329                         wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
 330                                                    ROBO_ARLCTRL_VEC_1,
 331                                                    &ports_read, 1);
 332                         wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
 333                                                     ROBO_ARLCTRL_ADDR_2,
 334                                                     addr_read, 3);
 335                         wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
 336                                                     ROBO_ARLCTRL_VEC_2,
 337                                                     &ports_read, 1);
 338                 }
 339         } else {
 340                 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
 341                                            ROBO_ARLCTRL_ADDR_2, addr_read, 3);
 342                 wpa_driver_roboswitch_read(drv, ROBO_ARLCTRL_PAGE,
 343                                            ROBO_ARLCTRL_VEC_2, &ports_read, 1);
 344                 /* or multiport address 2 */
 345                 if (os_memcmp(addr_read, addr_be16, 6) == 0 &&
 346                     ports_read == ports) {
 347                         wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
 348                                                     ROBO_ARLCTRL_ADDR_1,
 349                                                     addr_read, 3);
 350                         wpa_driver_roboswitch_write(drv, ROBO_ARLCTRL_PAGE,
 351                                                     ROBO_ARLCTRL_VEC_1,
 352                                                     &ports_read, 1);
 353                 } else return -1;
 354         }
 355         return 0;
 356 }
 357
 358
 359 static void * wpa_driver_roboswitch_init(void *ctx, const char *ifname)
 360 {
 361         struct wpa_driver_roboswitch_data *drv;
 362         char *sep;
 363         u16 vlan = 0, _read[2];
 364
 365         drv = os_zalloc(sizeof(*drv));
 366         if (drv == NULL) return NULL;
 367         drv->ctx = ctx;
 368         drv->own_addr[0] = '\0';
 369
 370         /* copy ifname and take a pointer to the second to last character */
 371         sep = drv->ifname +
 372               os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname)) - 2;
 373         /* find the '.' seperating <interface> and <vlan> */
 374         while (sep > drv->ifname && *sep != '.') sep--;
 375         if (sep <= drv->ifname) {
 376                 wpa_printf(MSG_INFO, "%s: No <interface>.<vlan> pair in "
 377                            "interface name %s", __func__, drv->ifname);
 378                 os_free(drv);
 379                 return NULL;
 380         }
 381         *sep = '\0';
 382         while (*++sep) {
 383                 if (*sep < '0' || *sep > '9') {
 384                         wpa_printf(MSG_INFO, "%s: Invalid vlan specification "
 385                                    "in interface name %s", __func__, ifname);
 386                         os_free(drv);
 387                         return NULL;
 388                 }
 389                 vlan *= 10;
 390                 vlan += *sep - '0';
 391                 if (vlan > ROBO_VLAN_MAX) {
 392                         wpa_printf(MSG_INFO, "%s: VLAN out of range in "
 393                                    "interface name %s", __func__, ifname);
 394                         os_free(drv);
 395                         return NULL;
 396                 }
 397         }
 398
 399         drv->fd = socket(PF_INET, SOCK_DGRAM, 0);
 400         if (drv->fd < 0) {
 401                 wpa_printf(MSG_INFO, "%s: Unable to create socket", __func__);
 402                 os_free(drv);
 403                 return NULL;
 404         }
 405
 406         os_memset(&drv->ifr, 0, sizeof(drv->ifr));
 407         os_strlcpy(drv->ifr.ifr_name, drv->ifname, IFNAMSIZ);
 408         if (ioctl(drv->fd, SIOCGMIIPHY, &drv->ifr) < 0) {
 409                 perror("ioctl[SIOCGMIIPHY]");
 410                 os_free(drv);
 411                 return NULL;
 412         }
 413         if (if_mii(&drv->ifr)->phy_id != ROBO_PHY_ADDR) {
 414                 wpa_printf(MSG_INFO, "%s: Invalid phy address (not a "
 415                            "RoboSwitch?)", __func__);
 416                 os_free(drv);
 417                 return NULL;
 418         }
 419
 420         /* set and read back to see if the register can be used */
 421         _read[0] = ROBO_VLAN_MAX;
 422         wpa_driver_roboswitch_write(drv, ROBO_VLAN_PAGE, ROBO_VLAN_ACCESS_5350,
 423                                     _read, 1);
 424         wpa_driver_roboswitch_read(drv, ROBO_VLAN_PAGE, ROBO_VLAN_ACCESS_5350,
 425                                    _read + 1, 1);
 426         drv->is_5350 = _read[0] == _read[1];
 427
 428         /* set the read bit */
 429         vlan |= 1 << 13;
 430         wpa_driver_roboswitch_write(drv, ROBO_VLAN_PAGE,
 431                                     drv->is_5350 ? ROBO_VLAN_ACCESS_5350
 432                                                  : ROBO_VLAN_ACCESS,
 433                                     &vlan, 1);
 434         wpa_driver_roboswitch_read(drv, ROBO_VLAN_PAGE, ROBO_VLAN_READ, _read,
 435                                    drv->is_5350 ? 2 : 1);
 436         if (!(drv->is_5350 ? _read[1] & (1 << 4) : _read[0] & (1 << 14))) {
 437                 wpa_printf(MSG_INFO, "%s: Could not get port information for "
 438                                      "VLAN %d", __func__, vlan & ~(1 << 13));
 439                 os_free(drv);
 440                 return NULL;
 441         }
 442         drv->ports = _read[0] & 0x001F;
 443         /* add the MII port */
 444         drv->ports |= 1 << 8;
 445         if (wpa_driver_roboswitch_join(drv, drv->ports, pae_group_addr) < 0) {
 446                 wpa_printf(MSG_INFO, "%s: Unable to join PAE group", __func__);
 447                 os_free(drv);
 448                 return NULL;
 449         } else {
 450                 wpa_printf(MSG_DEBUG, "%s: Added PAE group address to "
 451                            "RoboSwitch ARL", __func__);
 452         }
 453
 454         return drv;
 455 }
 456
 457
 458 static void wpa_driver_roboswitch_deinit(void *priv)
 459 {
 460         struct wpa_driver_roboswitch_data *drv = priv;
 461
 462         if (drv->l2) {
 463                 l2_packet_deinit(drv->l2);
 464                 drv->l2 = NULL;
 465         }
 466         if (wpa_driver_roboswitch_leave(drv, drv->ports, pae_group_addr) < 0) {
 467                 wpa_printf(MSG_DEBUG, "%s: Unable to leave PAE group",
 468                            __func__);
 469         }
 470
 471         close(drv->fd);
 472         os_free(drv);
 473 }
 474
 475
 476 const struct wpa_driver_ops wpa_driver_roboswitch_ops = {
 477         .name = "roboswitch",
 478         .desc = "wpa_supplicant roboswitch driver",
 479         .get_ssid = wpa_driver_roboswitch_get_ssid,
 480         .get_bssid = wpa_driver_roboswitch_get_bssid,
 481         .get_capa = wpa_driver_roboswitch_get_capa,
 482         .init = wpa_driver_roboswitch_init,
 483         .deinit = wpa_driver_roboswitch_deinit,
 484         .set_param = wpa_driver_roboswitch_set_param,
 485         .get_ifname = wpa_driver_roboswitch_get_ifname,
 486 };